make_ext.pl run every darn time

I don't know if this is a feature of OS X, but I am getting quite bored 
of make_ext.pl being rerun every time "make perl" is run, see below.

It only takes couple of seconds in this box but it's still pretty dumb.

In slower/older boxes starting miniperl 101 times (I counted) is
not just dumb but outright painful.

$ make perl
./miniperl -Ilib make_patchnum.pl
Reusing 'git_version.h' and 'lib/Config_git.pl'
./miniperl -Ilib make_ext.pl ext/ExtUtils-Miniperl/pm_to_blib 
MAKE="/Applications/Xcode.app/Contents/Developer/usr/bin/make" 
LIBPERL_A=libperl.a
Running pm_to_blib for ext/ExtUtils-Miniperl directly
./miniperl -Ilib make_ext.pl cpan/Archive-Tar/pm_to_blib 
MAKE="/Applications/Xcode.app/Contents/Developer/usr/bin/make" 
LIBPERL_A=libperl.a
./miniperl -Ilib make_ext.pl dist/Attribute-Handlers/pm_to_blib 
MAKE="/Applications/Xcode.app/Contents/Developer/usr/bin/make" 
LIBPERL_A=libperl.a
...
Running pm_to_blib for cpan/version directly
./miniperl -Ilib make_ext.pl DynaLoader.o 
MAKE="/Applications/Xcode.app/Contents/Developer/usr/bin/make" 
LIBPERL_A=libperl.a LINKTYPE=static CCCDLFLAGS=
make perl  4.81s user 1.18s system 95% cpu 6.269 total

• make_ext.pl run every darn time by Jarkko Hietaniemi
• Re: make_ext.pl run every darn time by Craig A. Berry
• Re: make_ext.pl run every darn time by Jarkko Hietaniemi
• Re: make_ext.pl run every darn time by Craig A. Berry
• Re: make_ext.pl run every darn time by Nicholas Clark